All Oakley lenses offer HDO® Technology with the following benefits: Clarity: Conventional lenses can magnify images. HDO® precision gives less distorted vision across the entire field of view. Refraction: With regular lenses, objects aren’t really where you see them. HDO® offers a truer visual image so your brain won’t have to work overtime.UV Protection: All Oakley lenses block 100% of UVA, UVB & UVC rays & harmful blue light up to 400 nm. violet IRIDIUM